Lehmann, Ruth T."The Significance of First-Year College Marks."Educational Research Bulletin, XXII (1943), 217-218.
2.
Moore, Bruce V., Lapp, C. J. and Griffin, Charles H.Manual for the Engineering and Scientific Aptitude Test. New York: The Psychological Corporation, 1943. Pp. 8 .
3.
Read, Cecil B."The Relationship of Scholastic Averages in Various Semesters."School and Society , LII (1940), 468-469.
4.
Rogers, Herbert W."The Reliability of College Grades."School and Society, XLV (1937), 758 -760.
5.
Thurstone, L. L. and Thurstone, T. G.Manual for the American Council on Education Psychological Examination. Washington: American Council on Education, 1946. Pp. 7.
6.
Toops, Herbert A.Manual for the Ohio State University Psychological Test. Chicago : Science Research Associates, 1941 . Pp. 4.
7.
Traxler, Arthur E. "The Correlation Between Achievement Scores and School Marks in an Independent School for Boys." Journal of Applied Psychology, XXIV (1940), 58 -63.
8.
Zyve, David L.Explanatory Booklet for the Stanford Scientific Aptitude Test. Stanford University: Stanford University Press, 1930. Pp. 16.